package com.lwq.util;

import com.lwq.constants.ScheduleConstants;
import com.lwq.exception.TaskException;
import com.lwq.model.SysTask;
import org.quartz.*;

/**
 * Description:
 * Author: LiuWenQing
 * Datetime: 2021/6/16
 * @author LiuWenQing
 */
public class ScheduleUtils {


    private static Class<? extends Job> getQuartzJobClass(SysTask task)
    {
        boolean isConcurrent = "0".equals(task.getConcurrent());
        return isConcurrent ? QuartzJobExecution.class : QuartzDisallowConcurrentExecution.class;
    }

    /**
     * 构建任务键对象
     */
    public static JobKey getJobKey(Long jobId) {
        return JobKey.jobKey(ScheduleConstants.TASK_CLASS_NAME + jobId);
    }

    /**
     * 构建任务触发对象
     */
    public static TriggerKey getTriggerKey(Long jobId)
    {
        return TriggerKey.triggerKey(ScheduleConstants.TASK_CLASS_NAME + jobId);
    }

    /**
     * 设置定时任务策略
     */
    public static CronScheduleBuilder handleCronScheduleMisfirePolicy(SysTask task, CronScheduleBuilder cb)
            throws TaskException {
        switch (task.getMisfirePolicy())
        {
            case ScheduleConstants.MISFIRE_DEFAULT:
                return cb;
            case ScheduleConstants.MISFIRE_IGNORE_MISFIRES:
                return cb.withMisfireHandlingInstructionIgnoreMisfires();
            case ScheduleConstants.MISFIRE_FIRE_AND_PROCEED:
                return cb.withMisfireHandlingInstructionFireAndProceed();
            case ScheduleConstants.MISFIRE_DO_NOTHING:
                return cb.withMisfireHandlingInstructionDoNothing();
            default:
                throw new TaskException("The task misfire policy '" + task.getMisfirePolicy()
                        + "' cannot be used in cron schedule tasks", TaskException.Code.CONFIG_ERROR);
        }
    }

    public static void createScheduleJob(Scheduler scheduler, SysTask task) throws TaskException, SchedulerException {
        Class<? extends Job> jobClass = getQuartzJobClass(task);
        Long taskId = task.getId();
        JobDetail jobDetail = JobBuilder.newJob(jobClass).withIdentity(getJobKey(taskId)).build();

        // 表达式调度构建器
        CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule(task.getCron());
        cronScheduleBuilder = handleCronScheduleMisfirePolicy(task, cronScheduleBuilder);

        // 按新的cronExpression表达式构建一个新的trigger
        CronTrigger trigger = TriggerBuilder.newTrigger().withIdentity(getTriggerKey(taskId))
                .withSchedule(cronScheduleBuilder).build();

        // 放入参数，运行时的方法可以获取
        jobDetail.getJobDataMap().put(ScheduleConstants.TASK_PROPERTIES, task);

        // 判断是否存在
        if (scheduler.checkExists(getJobKey(taskId))) {
            // 防止创建时存在数据问题 先移除，然后在执行创建操作
            scheduler.deleteJob(getJobKey(taskId));
        }

        scheduler.scheduleJob(jobDetail, trigger);

        // 暂停任务
        if (task.getStatus().equals(ScheduleConstants.Status.PAUSE.getValue())) {
            scheduler.pauseJob(ScheduleUtils.getJobKey(taskId));
        }
    }
}
